Willabd t



(NoModeL) W. T. HATCH.

I STEAM BOILER FURNAGB.

Patented Nov. 28, 1882.

UNITE STATES PATENT OFFICE.

WILLARD T. HATCH, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE ATLAS ENGINEWORKS, OF SAME PLACE.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 268,098, dated November28, 1882.

Application filed October 5. 1881. (No model.)

To all whom it may concern Be it known that I, WILLARD T. HATCH, ofIndianapolis, in the county of Marion,in the State of Indiana, haveinvented certain new and useful Improvements relating to Steam- BoilerFurnaces, of which the following is a specification.

I employ a casing of iron attached to the boiler and lined withfire-brick or analogous 1o non-conductingrefractory material. Theboiler,

with my furnace attached, may be moved without injury to the furnace orconnections. I term a boiler thus provided semi-portable. I make for thelining fire-bricks having semicylindrical grooves along two of theiredges. These bricks are laid with their grooved edges abutting againsteach other, thereby providing a cylindrical channel extendingalon g thejoints between the lines of bricks. In this channel I insert an ironrod.

The ends of the rod receive nuts,which, being screwed up on suitablewashers with gentle force, can hold the brickwork strongly together inone direction. The presence of the rod in the grooves along the edgesholdsthe bricks in position facewis'e.

The following is a description of what I consider the best means ofcarrying out the invention.

Theaccompanyingdrawingsformapartofthis 3o specification. Figures 1,2, 3,and 4 are isometrical views. Fig. 1 represents one of the bricksdetached. Fig. 2 represents the front portion of a boiler having myfurnace attached, a portion being broken away to better show its con- 5struction. Fig. 3 is a corresponding view, showing a differentarrangement of the bricks and of the rods. Fig.4 represents a modifiedform of one of the bricks. Fig. 5 is a vertical section through aportion corresponding to 40 Fig. 2.

their edges riveted, welded, or otherwisestrongly and reliably joined.The casing B extends down perpendicularly from one side of the boiler.It describes a curve of small radius at A its junction with the bottomB, then extends across horizontally, and, describing another similarcurve on the opposite side, extends upward vertically to the other sideof the boiler.

It is strongly connected to the boiler by riveting or otherwise. Greatfirmness and stiffness are secured to the shell B byits being attachedrigidly to the bottom 13 and to the boiler A.

A connected structure is thereby formed which possesses the advantagesof compactness, firmness, stiffness, solidity, and integrity, and thehereinafter-described lining will be more securely held.

On the interior, near the bottom, are riveted or otherwise attachedlongitudinal shelves 0, one on each side. On these shelves are sup- 7oported fire-bricks M, which extend up to a line near the junction of thecasing B with the boiler A. These bricks are locked together by rods D,which lie in grooves m in the edges of the bricks, as shown in Figs. 2and 3. The figures differ in the arrangement of the bricks and rods. Allthe bricks are formed with the grooves extending along the narrowestedges or ends. In Fig. 2 the walls are built with the greatest length ofthe bricks extending 8o horizontally,an dconsequentlywiththegroovededges or ends extending up and down. The iron rods D in these groovesstand vertically. In Fig. 3 the bricks are laid with their greatestlength up and down, and consequently with their grooved edges extendinghorizontally. In this figure the iron rods D, being in these grooves,runhorizontally.

D D are nuts fitting on the threaded ends of the rods D. There may bewashersone for go each rod, or, better, a strip of iron punched at theproper intervals to press against the bricks,

being held thereto by the nuts D.

I give a slight preference to the arrangement shown in Fig. 2, butbelieve either plan 5 will successfully carry out the invention. Thebricks shown in Figs. 1, 2, and 3 are solid, but there is a considerablerecess, M, in one of the extended sides or faces. This recess ispresented outward and forms an air-space be Ioo tween the main. bodiesof the bricks and the metal casing B. This space serves to intercept thetransmission of heat. Fig. 4 shows a form of brickin which acavityextends through the center of the brick, which performs the function inan acceptable manner. In the form shown in Fig. 3 the back ends of therods D may have a nut similar to that shown at the front end. In theform shown in Fig. 2 the upper end of each rod D is bent outward atright angles. This allows a firm hold of the upper tier of bricks or ofa plate of metal applied thereon. Both ends of the rods may becorrespondingly bent, or both ends may have nuts in either position. Theends of the horizontal rods in Fig. 3 take hold strongly of the ordinaryiron front casing and of a corresponding casing extending across theback of the furnace. The vertical rods in Fig. 2 extend down to theshelf 0. The rods not only aid each brick to support itself in place byits neighbors and combine the whole together, but also may support thewhole wall by the engagement of their ends with strongly-supportedparts.

My furnace may support the boiler or the boiler may support the furnace,according to circumstances. Each may be supported independently, ifdesired but the construction affords great facilities for moving theboiler and furnace bodily without the parts becoming disconnected. Ihave in my experiments mounted the boiler and the furnace together on arigid frame of cast-iron, which latter is moved by any suitable means,carrying the boiler and furnace with it.

The shelf 0 should be at or below the level of the grate, so as to allowthe fire-brick to extend completely past the hottest portion. The spacebelow is available for the induction of air and for the storage of ashesand the like. This space also increases the facility for raking outashes and clinker from the bottom of the furnace.

The casing may extend around underneath the grates the entire length ofthe boiler or any part of it, or it may stop on each side at the lowersupporting-shelf for lining, leaving the bottom open below. This formmay be used when the boiler is to be kept in one position foralongtimeover a suitably-arranged pit for the continued deposit of soot andashes.

The bottom and sides B B of the shell being formed integral or rigidlyunited, and the top of the shell being riveted to the boiler, a verystrong structure is obtained, and the inclosed lining M will not besubjected to any strains or twists.

Modifications may be made in many of the ecsmes bricks of half theregular width, and, by arranging themjudiciously, can cause the bricksto break joints one way-that is to say, the

joints where the rods D are inserted-must be extend through the casing Bor through the shelf 0. On the other hand, the bent ends at the top inFigs. 2 and 5 may extend through the casing and have nuts, if desired.Where the extra trouble and expense will be warranted, the horizontaljoints in Fig. 2 and the vertical joints in Fig. 3 may be tongued andgrooved together at the same time that the other joints-that is to say,the "ertical in Fig. 2 and the horizontal in Fig. 3-are keyed or doweledby the iron rods D.

I claim as my invention- 1. The fire-bricks M, each having achamber, M,extending over its main portion, and grooved ends at m, in combinationwith locking-rods D, furnace-shell B, and boiler A, as herein specified.

2. In combination with the boiler A, furnaceshell B, and fire-bricks M,having grooved ends, substantially as indicated by m, a series of metalrods, D, arranged to perform the double functions of doweling the bricksto v guard against lateral displacement and tying them together in theplane of the wall,as herein specified.

3. In combination with a boiler, a metallic shell riveted thereto,having sides B and bottom B, and a lining of fire-brick or analogousrefractory material,the shelf 0, adapted to support the lining and leavea wider space below for the ash-pit, as herein specified.

4. The boiler A, furnace-shell B, refractory lining M, composed ofseparate bricks or sections havingbroad air-chambers Mand grooves on,metal rods D, nuts D, and shelves 0, combined and arranged forjointoperation as herein specified.

In testimony whereofI have hereunto set my hand, at Indianapolis,Indiana, this 27th day of September, 1S8l,in the presence of twosubscribing witnesses.

WILLARD T. HATCH.

Witnesses:

Is. McDowELL, CHAS. B. THOMPSON.

ICC

